Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A mobile station for use in a wireless network, the mobile station comprising: a processing circuitry configured, when a total transmit power for a sounding reference symbol exceeds a maximum transmit power, to scale a transmit power of the sounding reference symbol for each of a plurality of cells with a scaling factor such that a total of scaled transmit power of the sounding reference symbol for each of the plurality of cells is equal to or less than the maximum transmit power; and a transmitter configured to transmit a sounding reference signal on the sounding reference symbol, wherein the scaling factor is same across the plurality of cells.
A mobile phone in a wireless network adjusts its transmission power when sending a sounding reference signal (SRS) used for network optimization. If the total power needed to transmit the SRS across multiple cells exceeds the phone's maximum transmit power, the phone reduces the power of the SRS in each cell by the same scaling factor. This ensures the total scaled transmit power across all cells stays within the phone's limit while still allowing the base station to receive and use the SRS for uplink channel estimation.
2. The mobile station of claim 1 , wherein a last single carrier, frequency division multiple access (SC-FDMA) symbol of a sub-frame is configured as the sounding reference symbol.
The mobile phone from the previous SRS transmit power adjustment also configures the last SC-FDMA (Single-Carrier Frequency-Division Multiple Access) symbol of a sub-frame as the sounding reference symbol (SRS). This means the SRS signal is transmitted during this specific symbol within a given time slot, allowing the base station to measure channel quality at that point in time without interfering with other data transmissions.
3. The mobile station of claim 1 , wherein the scaled transmit power of a sounding reference symbol for each of cells is scaled based on ∑ c w c P SRS , c ( i ) ≤ P CMAX , where P CMAX is the maximum transmit power, P SRS,c (i) is the transmit power of a sounding reference symbol for a cell c in subframe i, and w c is the scaling factor for a cell c.
The mobile phone from the previous SRS transmit power adjustment reduces the transmit power of its sounding reference signal (SRS) based on the formula: ∑ c w c P SRS , c ( i ) ≤ P CMAX . Here, P CMAX is the phone's maximum transmit power. P SRS,c (i) is the original transmit power for the SRS in cell 'c' during subframe 'i'. 'w c' is the scaling factor applied equally to each cell 'c'. The scaling ensures that the sum of scaled SRS transmit powers across all cells does not exceed the phone's maximum power.
4. The mobile station of claim 1 , wherein the total transmit power for a sounding reference symbol for a subframe i for a serving cell c is scaled based on a minimum of a configured transmit power for the subframe i for the serving cell c and a value based upon a bandwidth of sounding reference symbol transmission in the subframe i for the serving cell c.
The mobile phone from the previous SRS transmit power adjustment scales the total transmit power for a sounding reference signal (SRS) in a subframe 'i' for a serving cell 'c' by taking the minimum of two values. The first value is the configured transmit power for subframe 'i' in serving cell 'c'. The second value is based on the bandwidth of the SRS transmission in that subframe for that cell. This ensures that the power scaling considers both the general power settings and the specific bandwidth used for the SRS.
5. The mobile station of claim 4 , wherein the value based upon a bandwidth of sounding reference symbol transmission in the subframe i for the serving cell c is adjusted by one of a semi-statically configured offset and a current physical uplink shared channel (PUSCH) power control adjustment for the serving cell c.
The mobile phone from the previous SRS transmit power adjustment refines the value based on the SRS bandwidth by applying either a semi-statically configured offset or a current physical uplink shared channel (PUSCH) power control adjustment for the serving cell 'c'. This means the bandwidth-dependent power value is further tuned based on longer-term configuration settings or immediate feedback from the network regarding uplink power control, allowing for more precise SRS power management.
6. A method, comprising: when a total transmit power for a sounding reference symbol exceeds a maximum transmit power for a mobile station in a wireless network, scaling a transmit power of the sounding reference symbol for each of a plurality of cells with a scaling factor such that a total of scaled transmit power of the sounding reference symbol for each of the plurality of cells is equal to or less than the maximum transmit power; and transmitting, from the mobile station, a sounding reference signal on the sounding reference symbol, wherein the scaling factor is same across the plurality of cells.
A method for a mobile phone in a wireless network to manage its transmit power when sending a sounding reference signal (SRS). If the total power required for the SRS exceeds the phone's maximum, the method reduces the SRS power in each of several cells by the same scaling factor. This ensures that the total scaled SRS power across all cells is within the phone's limit. The phone then transmits the SRS signal, enabling uplink channel estimation while respecting power constraints.
7. The method of claim 6 , wherein a last single carrier, frequency division multiple access (SC-FDMA) symbol of a sub-frame is configured as the sounding reference symbol.
The SRS transmit power scaling method from the previous description configures the last SC-FDMA (Single-Carrier Frequency-Division Multiple Access) symbol of a sub-frame as the sounding reference symbol (SRS). This specifies that the SRS signal is transmitted during this particular symbol in a given time slot, enabling channel measurements without disrupting other data transmissions.
8. The method of claim 6 , wherein the scaled transmit power of a sounding reference symbol for each of cells is scaled based on ∑ c w c P SRS , c ( i ) ≤ P CMAX , where P CMAX is the maximum transmit power, P SRS,c (i) is the transmit power of a sounding reference symbol for a cell c in subframe i, and w c is the scaling factor for a cell c.
The SRS transmit power scaling method from the previous description uses the formula ∑ c w c P SRS , c ( i ) ≤ P CMAX to scale the transmit power. P CMAX is the phone's maximum transmit power. P SRS,c (i) is the SRS transmit power for cell 'c' in subframe 'i'. 'w c' is a uniform scaling factor for cell 'c'. The formula ensures the sum of scaled SRS powers across all cells does not exceed the maximum.
9. The method of claim 6 , wherein the total transmit power for a sounding reference symbol for a subframe i for a serving cell c is scaled based on a minimum of a configured transmit power for the subframe i for the serving cell c and a value based upon a bandwidth of sounding reference symbol transmission in the subframe i for the serving cell c.
The SRS transmit power scaling method from the previous description scales the total transmit power for a sounding reference signal (SRS) for a subframe 'i' in a serving cell 'c' by taking the minimum of two values. One value is the configured transmit power for that subframe and cell. The other value is determined by the bandwidth of the SRS transmission in that subframe and cell. This ensures power scaling considers both general power settings and the bandwidth specifically used for SRS.
10. The method of claim 9 , wherein the value based upon a bandwidth of sounding reference symbol transmission in the subframe i for the serving cell c is adjusted by one of a semi-statically configured offset and a current physical uplink shared channel (PUSCH) power control adjustment for the serving cell c.
The SRS transmit power scaling method from the previous description refines the value based on the SRS bandwidth by applying either a semi-statically configured offset or a current physical uplink shared channel (PUSCH) power control adjustment for the serving cell 'c'. This refines the bandwidth-dependent power value by tuning it according to longer-term configuration settings or immediate network feedback, improving SRS power control accuracy.
11. A base station for use in a wireless network, the base station comprising: a receiver configured to receive a sounding reference signal on a sounding reference symbol; and a processing circuitry configured to employ the received sounding reference signal, wherein, when a total transmit power for a sounding reference symbol exceeds a maximum transmit power for a mobile station transmitting the sounding reference symbol, a transmit power of the sounding reference symbol is scaled for each of a plurality of cells with a scaling factor such that a total of scaled transmit power of the sounding reference symbol for each of the plurality of cells is equal to or less than the maximum transmit power, and wherein the scaling factor is same across the plurality of cells.
A base station in a wireless network receives a sounding reference signal (SRS) transmitted by a mobile phone. The base station uses the received SRS for network optimization. If the mobile phone's total transmit power for the SRS exceeds its maximum transmit power, the phone scales the SRS power in each cell by the same scaling factor. The base station is aware that this scaling occurs to allow proper interpretation of the received SRS.
12. The base station of claim 11 , wherein a last single carrier, frequency division multiple access (SC-FDMA) symbol of a sub-frame is configured as the sounding reference symbol.
The base station from the previous SRS reception description receives the sounding reference signal (SRS) on the last SC-FDMA (Single-Carrier Frequency-Division Multiple Access) symbol of a sub-frame. This specifies when the SRS signal is expected, as the mobile phone configures the signal to be transmitted during this symbol in a given time slot, allowing channel measurements to occur.
13. The base station of claim 11 , wherein the scaled transmit power of a sounding reference symbol for each of cells is scaled based on ∑ c w c P SRS , c ( i ) ≤ P CMAX , where P CMAX is the maximum transmit power, P SRS,c (i) is the transmit power of a sounding reference symbol for a cell c in subframe i, and w c is the scaling factor for a cell c.
The base station from the previous SRS reception description knows that the mobile phone scales its SRS transmit power according to the formula ∑ c w c P SRS , c ( i ) ≤ P CMAX . P CMAX is the mobile phone's maximum transmit power. P SRS,c (i) is the phone's SRS transmit power for cell 'c' in subframe 'i'. 'w c' is a uniform scaling factor for cell 'c'. The base station uses this information to correctly interpret the scaled signal.
14. The base station of claim 11 , wherein the total transmit power for a sounding reference symbol for a subframe i for a serving cell c is scaled based on a minimum of a configured transmit power for the subframe i for the serving cell c and a value based upon a bandwidth of sounding reference symbol transmission in the subframe i for the serving cell c.
The base station from the previous SRS reception description is aware that the mobile phone scales the total transmit power for the sounding reference signal (SRS) for a subframe 'i' in a serving cell 'c' by taking the minimum of two values: the configured transmit power and a value based on the SRS bandwidth. This information enables the base station to properly interpret the received signal, knowing how the phone manages its power.
15. The base station of claim 14 , wherein the value based upon a bandwidth of sounding reference symbol transmission in the subframe i for the serving cell c is adjusted by one of a semi-statically configured offset and a current physical uplink shared channel (PUSCH) power control adjustment for the serving cell c.
The base station from the previous SRS reception description understands that mobile phone refines the value based on the SRS bandwidth by applying either a semi-statically configured offset or a current physical uplink shared channel (PUSCH) power control adjustment for the serving cell 'c'. Knowing these adjustments enables the base station to precisely interpret the received and scaled SRS signal.
16. A method, comprising: receiving a sounding reference signal on a sounding reference symbol transmitted by a mobile station; and employing the received sounding reference signal in processing circuitry, wherein, when a total transmit power for a sounding reference symbol exceeds a maximum transmit power for the mobile station, a transmit power of the sounding reference symbol is scaled for each of a plurality of cells with a scaling factor such that a total of scaled transmit power of the sounding reference symbol for each of the plurality of cells is equal to or less than the maximum transmit power, and wherein the scaling factor is same across the plurality of cells.
A method at a base station for receiving a sounding reference signal (SRS) from a mobile phone and using it for network optimization. If the mobile phone's total SRS transmit power exceeds its maximum, the phone reduces the SRS power in each cell by the same scaling factor. The base station is aware of this scaling and accounts for it when processing the received SRS signal.
17. The method of claim 16 , wherein a last single carrier, frequency division multiple access (SC-FDMA) symbol of a sub-frame is configured as the sounding reference symbol.
The SRS reception method from the previous description receives the sounding reference signal (SRS) on the last SC-FDMA (Single-Carrier Frequency-Division Multiple Access) symbol of a sub-frame. This indicates the specific time slot when the SRS signal is expected, as the mobile phone configures the signal to be transmitted during this symbol.
18. The method of claim 16 , wherein the scaled transmit power of a sounding reference symbol for each of cells is scaled based on ∑ c w c P SRS , c ( i ) ≤ P CMAX , where P CMAX is the maximum transmit power, P SRS,c (i) is the transmit power of a sounding reference symbol for a cell c in subframe i, and w c is the scaling factor for a cell c.
The SRS reception method from the previous description accounts for the fact that the mobile phone scales its SRS transmit power according to the formula ∑ c w c P SRS , c ( i ) ≤ P CMAX . P CMAX is the phone's maximum transmit power. P SRS,c (i) is the phone's SRS transmit power for cell 'c' in subframe 'i'. 'w c' is a uniform scaling factor. The base station uses this to correctly interpret the received scaled signal.
19. The method of claim 16 , wherein the total transmit power for a sounding reference symbol for a subframe i for a serving cell c is scaled based on a minimum of a configured transmit power for the subframe i for the serving cell c and a value based upon a bandwidth of sounding reference symbol transmission in the subframe i for the serving cell c.
The SRS reception method from the previous description is aware that the mobile phone scales its total transmit power for the sounding reference signal (SRS) for a subframe 'i' in a serving cell 'c' by taking the minimum of the configured transmit power and a value based on the SRS bandwidth. This awareness enables the base station to properly interpret the received SRS signal.
20. The method of claim 19 , wherein the value based upon a bandwidth of sounding reference symbol transmission in the subframe i for the serving cell c is adjusted by one of a semi-statically configured offset and a current physical uplink shared channel (PUSCH) power control adjustment for the serving cell c.
The SRS reception method from the previous description understands that the mobile phone refines the value based on the SRS bandwidth by applying either a semi-statically configured offset or a current physical uplink shared channel (PUSCH) power control adjustment for the serving cell 'c'. By factoring in these adjustments, the base station can accurately process the received SRS signal.
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October 10, 2017
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